Smoking pipe



Sept. 30, 1952 P. GusTAFsoN 2,612,172

SMOKING PIPE Filed July 2o, 194e Patented Sept. 30, 1952 UNITED n `S'l'l-'IEIS PATENT OFFICE I L v 2,612,172 I n i SMOKING PIPE l Petergustafson, Chicago, Ill. Application July 2.0, 1948, 4Serial No. 39,619 f (ci. rais-184') 4 Claims. i 1

The present invention relates to smoking pipes and has for its principal object the provision of means to prevent accumulation `of vtarsorV other residue from the tobacco in the smoke passages, pipe stem and mouthpiece. 1

In introduction, it may tie-explained, that the problem of tar formation in pipesfhasllong been recognized, and various attempts have been made to prevent the tars and nicotine containing residues from being drawn through the pipe stem into the mouth of the smoker; yet so far as known to the applicant these have been uniformly unsatisfactory in that they fail to prevent the accumulation of toxic condensates in the smoke passages. That is, the varioustypes of nicotine traps, moisture grooves, cups, filters and cooling chambers apparently all have the same fundamental defect; and while they are initially effective to condense and 'collect the residues of the tobacco combustion, yet the liquid portion of the condensate is allowed to evaporate until the residue is in the form of a sticky andv gummy substance which adheres so rrnly to the walls of the smoke passages that its removalis diicult, if not impossible. Further smoking of the'pipe results in heating of the smoke passages so that the gummy residues are melted, and as the walls of the smoke passages get hot these residues give off noxious fumes, which are carriedin the smoke to the lungs of the smoker, y

It is accordingly the primary object ofthe present invention to eliminate the formation of tars or nicotine containing residues in the smoke passages of a pipe by expelling the condensed material from the pipe while the condensate is still in a liquid state. Inthis condition its removal is quite easy, since the liquid has not evaporated sufficiently to become sticky or gummy, and thus does not have a marked tendency to adhere to the surfaces of the smoke passages. More specifically, the present invention contemplates the provision of means to circulate fresh air through the smoke passages of the pipe under pressure, so that the passages may be thoroughly ventilated as often as required, (even while the tobacco in the pipe is lighted, if desired) so that all traces of moisture may be expelled. It is submitted that only by this expedient can the desired cleanliness of the passages be obtained, and that the present disclosure therefore presents a simple and effective remedy, overcoming the fundamental diificulty in previous devices intended to solve the problem involved.

A preferred embodiment of the inventive thought of this disclosure is illustrated in the drawing attached to and forming a part of the present specification, wherein:

Figure 1 is a cross sectional view through 'a smoking pipe, the mouthpiece being shown in elevation, constructed in accordance with these teachings; 1

Figure 2 is a similar view showing a changed position of parts;

Figure 3 .is a detail sectional view taken substantially on the plane of the line 3-3 of Figure l;

Figure 4 is a detail sectional view taken substantially Aon the plane of the line 4-4 of Figure 2.; and

Figure 5 is a detail sectional view taken substantially on the plane of the line 5-'5 of Figure l.

The pipe includes a bowl I0 and stem II with a mouthpiecegl2, having a reduced portion I3 tted into a suitable bore inthe end of the stem. A hollow metal tube I4 is mounted in the mouthpiece and extends through a bore in the stem to a point under the bowl I0. The tube I4 is perforated at I5 to provide an orifice to communicate with the bottom opening or orifice I6 of the bowl, so `that smoke from the burning tobacco may be drawn lthrough the tube and out through the channel Ilv of the mouthpiece. The tube extends beyond the opening I6, however, and is provided near its extremeA end with another opening or an air port I8 adapted to communicate/with an air passage I9 from the end of a small pump cylinder 2|, in which a piston 22 is slidably mounted. The end of the pump cylinder is closed in any convenient manner, as by a threaded plug 23, and a slide rod 24 and knurled knob 25 are provided so that the piston 22 may be manually manipulated vto force air from the pump cylinder outwardly through the tube I4 and channel I 1 of the stern on its inward stroke, and to draw fresh air into the smoke passages on the return stroke.

It will be noted when the pipe is in the normal smoking position, illustrated in Figurev l, the airport I8 is closed, so that no condensate will accumulate in the pump cylinder, yet the opening I5 in the` tube is open to complete a smoke passage from the pipe bowl through the stem and to the mouthpiece.Y By rotating the pipe stem a quarter turn, the opening I5 is closed off and the air port I8 brought into communication with the air' passage I9, so that the interior4 of the tube I4 and channel I'l of the mouthpiece are in direct communication with the pump cylinder 2|. Then, by reciprocating the rod 24 and piston 22, air may be forced out throughthe tube and pipe stem orifice to eject any foreign matter or tobacco residueV present in the smoke passages. The piston may be pumped a few strokes to alternately draw fresh air into the passages and force it out, to ventilate the passages and effectively prevent the accumulation of tars or nicotine containing residue. This is preferably done immediately after smoking, yet may be done even while the tobacco in the bowl is lighted, since the orice I in the tube is closed during the operation and no air is forced into or drawn from the bowl. Thus, the tube I4 and the orifice I5 and air port I8 coact with the opening I6 and air passage I9 to form a valve means actuated by shifting of the pipe mouthpiece to selectively open either the smoke passage to the bowl or the air passage to communicate with the pump.

It will be apparent from the above that the smoke passages of the pipe may be effectively maintained in clean condition by merely operating the pump a few strokes after smoking a pipefull of tobacco. Furthen in the event that this operation should be neglected and some residues accumulate as a result thereof, the residues may be removed by inserting the pipe stem in a suitable solvent `and then pumping a few strokes to draw the solvent back and forth through the smoke passages until all traces of foreign matter are flushed away.

It is thus seen that the present invention provides a means for maintaining'the smoke passages of a pipe in a thoroughly clean and sanitary condition without the need of resorting to filters, cups, cooling chambers or nicotine traps. Thus the device functions by ejecting the liquid condensates always present in tobacco smoke before they evaporate and acquire the gummy, sticky and odorous qualities so familiar to pipe users, and thus may prevent the accumulation of toxic substances in the smoke passages, rather than by attempting to trap or coniine these residues. It follows that the teachings of this disclosure avoids the fault of prior devices that, while successful in confining the tars, defeat their own purpose by drawing hot smoke over the residue and bringing noxious odors and fumes into the smoke. It is laccordingly submitted that the present teachings afford a means for maintaining the smoke passages of a pipe in a constantly clean, fresh, well ventilated and generally sanitary condition, to the end that the smoke will be pure, pleasing in aroma, and free of contaminating fumes. y

Having thus described ,the-invention what I claim as new and desire to protect by United States Letters Patent is:

1.-A smoking pipe comprising, a tobacco bowl andan integral stem wherein an opening in said bowl communicates with a bore in said stem, a channeled mouthpiece rotatably mounted in the end of said stem bore, a tube secured to said mouthpiece and extending into said stem bore to a point beyond said bowl, opening, said tube having a circumferentially and axially-spaced orifice and air port, said orifice being adapted to be positioned for either registering with said bowl opening or being sealed by the bottom of said bowl for alternate rotated positions of said tube, a pump cylinder below said bowl having van air passage with which said tube air port is registerable when said tube orice is sealed by the 2. A smoking pipe comprising, a tobacco bowl and an integral stemwherein an opening in said 4 bowl communicates with a bore in said stem, a channeled mouthpiece rotatably mounted in the end of said stem bore, a tube secured to said mouthpiece and extending into said stem bore to a point beyond said bowl opening, said tube having a circumferentially and vaxially-spaced orifice and air port, said orifice being adapted to be positioned for either registering with said bowl opening or being sealed by the bottom of said bowl for alternate rotated positions of said tube, said air Port being located outwardly from said opening, a pump cylinder integral with said bowl having its axis disposed parallel with said stem and located under said pipe bowl, said pump cylinder being formed with an air passage adapted to register with said air port when said tube orice is sealed by the bottom of said bowl, and a piston in said cylinder adapted to force air through said tube, bore and said mouthpiece channel when said air passage and air port are in registration.

3. A smoking pipe comprising, Ia tobacco bowl and an integral stem wherein an opening in said bowl communicates with a bore in said stem, a channeled mouthpiece rotatably mounted in the end of said stem bore, a tube secured to said mouthpiece and extending into said stem bore to a point beyond said bowl opening, said tube having circumferentially and axially-spaced orice and air port, said orice being adapted to be positioned for either registering with said bowl opening or being sealed by the bottom of said bowl for alternate rotated positions of said tube, a pump cylinder below said bowl having an air passage with which said tube Iair port is registerable when said tube oriiice is sealed by vthe bottom of said bowl, a solid piston in said cylinder adapted to force air through said tube and mouthpiece channel when said air passage and air port are in registration, a slide rod having one of its ends connected to said piston and extending through an end of said cylinder, and a knurled knob on the other end of said rod and Vlocated outside of said cylinder.

4. A smoking pipe comprising, a tobacco bowl and an integral stern wherein an opening in said bowl communicates with a bore in said stem, a channeled mouthpiece rotatably mounted in the end of said stem bore, a tube secured to said mouthpiece and extending into said stem bore to a point beyond said bowl opening, said tube having circumferentially and axially-spaced oriiice and air port, said orifice being adapted to be positioned for either registering with said bowl opening or being sealed by the bottom of said bowl for alternate rotated positions of said tube, said Iair port being located outwardly from said opening, a pump cylinder integral with said bowl with its axis disposed parallel with said stem and located under said pipe bowl, said pump cylinder being formed with an air passage adapted -to register with said air port when said tube orifice is sealed by the bottom of said bowl, a solid piston in said cylinder adapted to force air through said tube, bore and said mouthpiece channel when said air passage and air port are in registration, a slide rod having one of its ends connected to said piston and extending through an end of said cylinder, and a knurled knob on the other end of said rod and located outside of said cylinder.

PETER GUSTAFS ON.

(References on following page) :LEFERENCES CITED Number Y Name Date 2 T. 1 u 1,377,752 Coil Hhun May 10, 19 1 menoef i311; vggelferens are of record m the' 2,288,879 Ballentine July '7J 1942 UNITED STATES PATENTS 5 Y FOREIGN PATENTS Numbei- Name Date vNumber Country Date Y 574,956 Snyder Jan, 12, 1897 2,655 Great Br1.tai n 1396 674,202 Ferreira May 14, 1901 17,084 Great Bntam of 1890 951,030 Smith Mar, 1I 1910 26.952 Great Britain of 1903 999,120 Meza July 25, 1911 10 130,133 Switzerland Dec. 16, 1935 595,156 Germany Apr. 4, 1934 

